Outline

These ICs function in a variety of CPU systems and other logic systems, to detect power supply voltage and reset the system accurately when power is turned on or interrupted, and has a built-in fixed delay time generating circuit. This series has been represented in the past by PST591~595, and these new system reset ICs offer ultra-small size and low current consumption.

Features

1. Fixed delay time setting by counter timer

2. Low operating limit voltage                               0.65V typ.

3. Hysteresis voltage provided in detection voltage    50mV typ.

4. Low current consumption                                  ICCH=15µA typ.

5. 3 delay time products available

                                                  PST596 50ms

                                                  PST597 100ms

                                                  PST598 200ms

6. Each product has 10 detection voltage ranks. C : 4.5V typ. H: 3.1V typ.

                                                               D : 4.2V typ. I : 2.9V typ.

                                                               E : 3.9V typ. J : 2.7V typ.

                                                               F : 3.6V typ. K : 2.5V typ.

                                                              G : 3.3V typ. L : 2.3V typ.

Applications

1. Reset circuits in microcomputers, CPUs and MPUs

2. Logic circuit reset circuits.

3. Battery voltage check circuits.

4. Back-up power supply switching circuits.

5. Level detection circuits.

6. Mechanical reset circuits